/* swap1.c -- first attempt at a swapping function */
#include <stdio.h>
void interchange(int u, int v);	/* declare function */

int main(void)
{
	int x = 5, y = 10;

	printf("Originally x = %d and y = %d.\n", x, y);
	interchange(x, y);
	printf("Now x = %d and y = %d.\n", x, y);

	return 0;
}

void interchange(int u, int v)	/* declare function */
{
	int temp;

	temp = u;
	u = v;
	v = temp;
}